Serial Shift Data Register (Sdr) - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 20 EXPANDED I/O SERIAL INTERFACE

20.2.2 Serial Shift Data Register (SDR)

This section describes the configuration and functions of the serial shift data register
(SDR).
I Serial shift data register (SDR)
The bit configuration of the serial shift data register (SDR) is illustrated below.
SDR
address: 000028
00002C
The serial shift register (SDR) stores transfer data of the serial I/O unit.
The SDR cannot be read or written during data transfer.
384
7 6 5
D7 D6 D5 D4
H
R/W R/W R/W R/W R/W
H
4 3 2 1
D3 D2 D1
R/W R/W R/W
0 Initial value
D0 XX
H
(Undefined)